12 parts of motor trucks, namely drive axles; land motor vehicle drive axle parts, namely shafts, differentials, and housing, air and electric shift controls, land motor vehicle gear change speed transmissions and parts thereof, namely clutches, gears, synchronizers and shafts; trailer axles and land motor vehicle front steering axles; land motor vehicle brakes and brake assemblies and parts thereof; land motor vehicle suspension parts, namely vehicle leaf springs; valves for vehicle tires; parts of tractors, namely hydraulic power steering units, hydraulic motors for land motor vehicles; wheel motors for land motor vehicles; hydrostatic transmissions for land motor vehicles; locking and limited slip vehicle differentials for land motor vehicles